Analog
As we know, there is no ADC in the Raspberry Pi, so it can not work with analog sensor directly. Now with the help of the build-in MCU
STM32, the Grove base hat can work as an external 12-bit ADC, which means you can use analog sensor with your Raspberry Pi. Even
more pleasing is that not one but four analog Grove sockets are available.
The analog sensor inputs the analog voltage into the 12-bit ADC. After the ADC convert the analog data to digital data, it input the digital data
to the Raspberry Pi through the I2C interface.
I2C
There are three I2C port available in this board, they all connect to the I2C pin of the raspberry directly. You can consider this part as an I2C
hub. Most of seeed's new grove modules have I2C interface, you may find those three port is extremely useful.
